Pheochromocytomas and extra-adrenal paragangliomas are rare tumors arising from neural crest tissue that develops into sympathetic and parasympathetic paraganglia throughout the body. Sympathetic paraganglia include the following:
The adrenal medulla.
The organ of Zuckerkandl near the aortic bifurcation.
Other paraganglia along the distribution of the sympathetic nervous system.
Parasympathetic paraganglia include the following:
The carotid body.
Other paraganglia along the...